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All about Limit Lines
Limit lines are visual representations, drawn on the FieldFox screen, of the specified limits for a
measurement. With this capability, you can easily compare measured data versus specifications.
Optionally, you can enable an audible beep and display Pass or Fail information for each
measurement.
IMPORTANT! For CAT and NA modes, limit lines do not apply
where F1 = F2.
— You can have up to as many limit line segments as there are data points for each measurement
trace allowing you to test all aspects of your measurements.
— Limit lines are available in CAT Mode, NA Mode, NF Mode, and SA Mode. Power Meter Mode
uses different limit settings. Learn more in
— Limit lines and limit testing are NOT allowed in NA Mode with Smith Chart or Polar display
formats.
— A simple Display Line is also available in I/Q Analyzer, NF, and SA Modes ONLY. Learn more in
"Display Line (I/Q, NF, and SA Modes Only)" on page
— Limit lines can be saved and recalled with an *.sta file. Learn more
Limits" on page
502. They can also be saved and recalled independently from the Limit softkeys.
Learn more
in"How to Save and Recall Limits" on page
How to Create Fixed Limit Lines
There are two ways to build a Fixed limit line:
1. 1. Build (limits) From a Trace. Learn how in
2. Enter X/Y data points into the on-screen editor. The limit line is formed as the FieldFox
'connects the dots' on the screen. To create frequency gaps that are NOT tested, use separate
limit lines. The X-axis values for two lines can overlap.
— Press Limit 8.
— Then
Edit
Limits. A limit line table appears.
— Use the Up / Down arrows and rotary knob to navigate the cursor to the following editable cells.
— Description - Press Edit, then enter a description for the limit line using the FieldFox
labeler. Learn how in
— Fixed/Relative – Press
——Fixed - the limit line does not move. The X/Y coordinates are absolute locations on
the screen.
——Relative - the limit line moves relative to the center frequency and acquisition.
Note: It is easiest to first create Fixed Limits, then change this setting to Relative.
Learn more
— Upper/Lower – Press
Keysight N9927-90001 User's Guide
Data Analysis Features
All about Limit Lines
"Limits" on page
"Build From Trace" on page
"How to use the FieldFox labeler " on page
Edit
to toggle between the following:
"Relative Limit Lines" on page
Edit
to toggle between the following:
344.
503.
in"How to Save and Recall
502.
500.
546.
500.
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Table of Contents
Troubleshooting
